Neal
Live life, don't let it live you!
Could I move my hillstream loach into my 24oC tropical tank? Just in the current tank is quite small, and has no water flow at all! Also it has no oxygen, and my main tank has plenty!
or what other tank are you thinking of ?
Why not just turn that tank into a coldwater tank ? They shouldn't be in anything more than 68F (20C) - but then again they shouldn't even be in a tank that small 
I have 4 neon tetras and 2 corys in that tank, don't they need to be at 24oC to live?